/*
 * Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package com.sun.org.apache.xml.internal.security.keys.content;

import com.sun.org.apache.xml.internal.security.exceptions.XMLSecurityException;
import com.sun.org.apache.xml.internal.security.signature.XMLSignatureException;
import com.sun.org.apache.xml.internal.security.transforms.Transforms;
import com.sun.org.apache.xml.internal.security.utils.Constants;
import com.sun.org.apache.xml.internal.security.utils.SignatureElementProxy;
import com.sun.org.apache.xml.internal.security.utils.XMLUtils;
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

public class RetrievalMethod extends SignatureElementProxy implements KeyInfoContent {

  /**
   * DSA retrieval
   */
  public static final String TYPE_DSA = Constants.SignatureSpecNS + "DSAKeyValue";
  /**
   * RSA retrieval
   */
  public static final String TYPE_RSA = Constants.SignatureSpecNS + "RSAKeyValue";
  /**
   * PGP retrieval
   */
  public static final String TYPE_PGP = Constants.SignatureSpecNS + "PGPData";
  /**
   * SPKI retrieval
   */
  public static final String TYPE_SPKI = Constants.SignatureSpecNS + "SPKIData";
  /**
   * MGMT retrieval
   */
  public static final String TYPE_MGMT = Constants.SignatureSpecNS + "MgmtData";
  /**
   * X509 retrieval
   */
  public static final String TYPE_X509 = Constants.SignatureSpecNS + "X509Data";
  /**
   * RAWX509 retrieval
   */
  public static final String TYPE_RAWX509 = Constants.SignatureSpecNS + "rawX509Certificate";

  /**
   * Constructor RetrievalMethod
   */
  public RetrievalMethod(Element element, String BaseURI) throws XMLSecurityException {
    super(element, BaseURI);
  }

  /**
   * Constructor RetrievalMethod
   */
  public RetrievalMethod(Document doc, String URI, Transforms transforms, String Type) {
    super(doc);

    this.constructionElement.setAttributeNS(null, Constants._ATT_URI, URI);

    if (Type != null) {
      this.constructionElement.setAttributeNS(null, Constants._ATT_TYPE, Type);
    }

    if (transforms != null) {
      this.constructionElement.appendChild(transforms.getElement());
      XMLUtils.addReturnToElement(this.constructionElement);
    }
  }

  /**
   * Method getURIAttr
   *
   * @return the URI attribute
   */
  public Attr getURIAttr() {
    return this.constructionElement.getAttributeNodeNS(null, Constants._ATT_URI);
  }

  /**
   * Method getURI
   *
   * @return URI string
   */
  public String getURI() {
    return this.getURIAttr().getNodeValue();
  }

  /**
   * @return the type
   */
  public String getType() {
    return this.constructionElement.getAttributeNS(null, Constants._ATT_TYPE);
  }

  /**
   * Method getTransforms
   *
   * @return the transformations
   */
  public Transforms getTransforms() throws XMLSecurityException {
    try {
      Element transformsElem =
          XMLUtils.selectDsNode(
              this.constructionElement.getFirstChild(), Constants._TAG_TRANSFORMS, 0);

      if (transformsElem != null) {
        return new Transforms(transformsElem, this.baseURI);
      }

      return null;
    } catch (XMLSignatureException ex) {
      throw new XMLSecurityException("empty", ex);
    }
  }

  /**
   * @inheritDoc
   */
  public String getBaseLocalName() {
    return Constants._TAG_RETRIEVALMETHOD;
  }
}
